Update CODEOWNERS

Replacing @arob98  with @martinekuan

Author: JasonWHowell

CODEOWNERS

@@ -9,12 +9,12 @@ articles/jenkins/ @TomArcherMsft
 articles/terraform/ @TomArcherMsft
 
 # Requires Internal Review
-articles/best-practices-availability-paired-regions.md @jpconnock @arob98 @syntaxc4 @tysonn @snoviking
+articles/best-practices-availability-paired-regions.md @jpconnock @martinekuan @syntaxc4 @tysonn @snoviking
 
 # Governance
 articles/governance/ @DCtheGeek
 
 # Configuration
-*.json @SyntaxC4 @snoviking @arob98
-.acrolinx-config.edn @MonicaRush @arob98
-articles/zone-pivot-groups.yml @SyntaxC4 @snoviking @arob98
+*.json @SyntaxC4 @snoviking @martinekuan
+.acrolinx-config.edn @MonicaRush @martinekuan
+articles/zone-pivot-groups.yml @SyntaxC4 @snoviking @martinekuan